Used it for the first time yesterday (tough bite) and it kept them lively all afternoon. Used the frozen pack idea (didn’t do a water bottle because I have a ton of those blue ice packs in the freezer already), and that water was super cold all day. The 1.3 gallon bucket fit nicely under my boat seat, so it stayed relatively “in the shade” all day too. Very happy with this little setup.
All the best,
Glenn